Results 91 to 100 of about 512,795 (332)
The Enrichment History of Baryons in the Universe
, 2006 We present predictions for the cosmic metal budget in various phases of baryons from redshift z=6-0, taken from a cosmological hydrodynamic simulation that includes a well-constrained model for enriched galactic outflows. We find that substantial amounts
Davé, Romeel, Oppenheimer, Benjamin D.
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The chemistry of C3 & Carbon Chain Molecules in DR21(OH) [PDF]
, 2012 (Abridged) We have observed velocity resolved spectra of four ro-vibrational far-infrared transitions of C3 between the vibrational ground state and the low-energy nu2 bending mode at frequencies between 1654--1897 GHz using HIFI on board Herschel, in ...
Aikawa +70 more
core +5 more sources
Advanced Engineering Materials, EarlyView.The thermal diffusivity of MgO‐C refractories is highly sensitive to sample preparation and processing procedures. In this article, the effects of coking sequence, machining conditions, structural inhomogeneity, and graphite coating application on measurements using laser flash apparatus are systematically investigated.
Luyao Pan +4 more
wiley +1 more source
Improvement of forging die life by failure mechanism analysis**
Journal of the Mechanical Behavior of Materials, 2022 This study analyses the causes of rapid failure at the early stages of hot forging tools. Tool life generally refers to the number of forgings that meet the required geometry, properties and quality produced by a tool.
Abd AL-Kareem Ahmed Ibrahim +2 more
doaj +1 more source
Advanced Engineering Materials, EarlyView.It is shown that laser ablation pretreatment under oxygen‐free conditions enables copper–aluminium bonding at significantly lower deformation degrees and improved properties compared to mechanical brushing. Laser ablation further increases interface contact area and induces favourable residual stress states and microstructural compatibility ...
Khemais Barienti +11 more
wiley +1 more source
Mechanical and microstructural properties of autogenous arc welds of 2 GPa-strength hot-press-forming steel [PDF]
, 2022 Kwang-Soo Kim +5 more
openalex +1 more source
Advanced Engineering Materials, EarlyView.This study investigates the tribological response of 60NiTi alloy under dry, water‐lubricated and high‐temperature conditions. The alloy exhibits decreasing wear volume and friction with increasing temperature due to the formation of protective oxide layers. The work clarifies dominant wear mechanisms and demonstrates the suitability of 60NiTi for high‐
Anthony Onyebuchi Okoani +2 more
wiley +1 more source
Methodology for additive repair of press hardening dies using generic die segments and targeted deposition strategy [PDF]
MATEC Web of ConferencesPress hardening is extensively used in the automotive, agricultural and other branches of industry to efficiently produce high-strength parts by integrating a heat treatment into the hot forming process.
Alimov Artem +6 more
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ROSAT observations of the dwarf starforming galaxy Holmerg II (UGC 4305)
, 1999 We present ROSAT PSPC and HRI observations of the dwarf irregular galaxy Holmberg II (UGC4305). This is one of the most luminous dwarf galaxies (Lx~ 10^{40} erg s^{-1} cm^{-2}) detected in the ROSAT All-Sky Survey.
Georgantopoulos, I. +2 more
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Handbook of Establishing and Maintaining Oxygen‐Free Atmospheres
Advanced Engineering Materials, EarlyView.This study presents a practical framework for creating oxygen‐free atmospheres at ambient pressure using silane‐doped inert gases. The results show that ultra‐low oxygen levels and strongly reduced water content can be achieved through controlled silane dosing, drying systems, and sensor monitoring.
Sascha Jan Zimmermann +3 more
wiley +1 more source